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Full Discussion: Tip: alternative for NR==FNR in awk
Top Forums Shell Programming and Scripting Tip: alternative for NR==FNR in awk Post 302911514 by jethrow on Friday 1st of August 2014 07:01:17 AM
Old 08-01-2014
Another option would be to just check the filename:
Code:
awk '
BEGIN {f=FILENAME}
FILENAME==f {A[$1]; f=FILENAME; next}
($1 in A)
' file1 file2

The ultra-short-code-hackers can even use:
Code:
awk '
FILENAME==f {A[$1]; f=FILENAME; next}
($1 in A)
' f=file1 file1 file2

Last edited by jethrow; 08-01-2014 at 08:20 AM..
 

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xzdiff

XZDIFF(1)							     XZ Utils								 XZDIFF(1)

NAME

       xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files

SYNOPSIS

       xzcmp [cmp_options] file1 [file2]
       xzdiff [diff_options] file1 [file2]
       lzcmp [cmp_options] file1 [file2]
       lzdiff [diff_options] file1 [file2]

DESCRIPTION

       xzcmp  and  xdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options specified are passed
       directly to cmp or diff.  If only one file is specified, then the files compared are file1 (which must have a suffix of	a  supported  com-
       pression  format)  and  file1 from which the compression format suffix has been stripped.  If two files are specified, then they are uncom-
       pressed if necessary and fed to cmp(1) or diff(1).  The exit status from cmp or diff is preserved.

       The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils.

SEE ALSO

       cmp(1), diff(1), xz(1), gzip(1), bzip2(1), zdiff(1)

BUGS

       Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified.

Tukaani 							    2009-07-05								 XZDIFF(1)
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